Filtering apparatus.



C. l. BROCKBANK.

FILTERING APPARATUS.

y APPLlcAT |oN FILED JANJ, 1914.

Patented Sept. 7, 1915.

u n ,my

INVENTOR w messes /fr 7*'1 M FILTERING- APPARATUS.

Specification of Letters Patent.

Patented Sept. 7, 1915.

Application filed January 7, 19m serial No. 810,759. y

To all whom t may concern.'

Be it known that I, CLARENCE J. BROCK- BAN'K, a subject of the King ofGreat Britain, residing a-t Niagara Falls, Ontario, Canada, haveinvented Aa new and useful Improvement in Filtering Apparatus, of whichthe following is a full, clear, and exact description, reference beinghad to the forming part of this speclfication, in which the figure is adiagrammatic vertical section showing one form of filter constructed inaccordance with my invention.

My invention relates to the filtering of slimes and liquids carryingsuspended sol- -1ds; land particularly filtering of corrosive tered isforced liquids such as acids which have a corrosive action on theapparatus employed. It is also particularly designed for filters of thesubmerged type in which the fiuid to be lthrough the filtering diaphragmby difference in pressure between the two sides of this filter plate ordiaphragm, such, for example, las, shown in United States Patent No.764,486, granted to George Moore, on July 5, 1904. l

'Ilhe invention consists in providing a filter plate of acid resistingmaterial, which is set in a suction element consisting preferably ofsilicon or silicon alloy. The filter plate or diaphragm is preferablycomposed of compacted carborundum' of a uniformly porous structure andcomposed of very ne crystals bound together without a foreign binder,such, for example, as described in United States Patent No. 992,698,granted to Frank J. Tone on May 16, 1911. This diaphragm is resistant tonearly all acids, including hydrochloric, sulphuric and nitric aci s. a

In the drawing, in which I show one form of my invention, 2 represents aresistant filtering receptacle in which is submerged the bell-shapedfilter holder 3. This filter holder is preferably circular in form andis formed of cast silicon or silicon alloy, which is highly resistant toacids. In the mouth' of this bell-shaped holder is closely fitted thecarborundum filter 4, which may have taperingsides to fit correspondingtapered surfaces in the mouth of the holder, it being keyed in by blocks5 of silicon.

The v silicon may be cast upon and around the carborundum plate or theholder may be removably secured in any desirable manner. The bell-shapedholder being connected up to any suitable source of suction, the liquidbearingI the suspended solids is drawn through the filter plate to givethe filter action. The solids in this case will be deposited upon theouter face of the plate and may be removed from the plateintermittently, either by withdrawing the plate, reversing the pressure,or in any other desirable way.

My invention is especially desirable in the concentration of'muddy acidssuch as are obtained inthe manufacturexof explosives. Unless -the muddysediment is removed from these acids they are very difiicult toconcentrate.

The advantages of .my invention result from the simple and eectivefiltering device which is acid resistant both as to plate andv holder.

Many changes may be made in the form and arrangement of the apparatuswithout departing from my invention, as I consider myself the first touse a filter plate of acid resistant material set in a support formed ofsilicon or siliconl alloy.

By the word silicon in my claims, I intend to cover either silicon orsilicon alloy;

I claim:

1. A filter device comprising a filter plate of carborundum free fromany foreign binding substance, and a carrier or support therefor of acidresisting material.

2. A filter device comprising a filter plate of carborundum free fromany foreign binding substance, and a carrier or support therefor ofsilicon.

3. filter device comprising a filter plate of carborundum free from anyforeign binding substance, and a carrier or support therefor of acidresisting material, together with acid resisting keying means forsecuring the filter plate in the carrier o r support.

In testimony whereof, I have hereunto set my hand.

CLARENCE J. BROCKBANK. 1Witnesses:

W. J. .FAwCETn H. C. MARTIN.

